I agree we need more maps.
But more different gameplay is also something that is renewing the interest in the game.
More maps is really needed… and a system to dynamically generate missions as tiles of maps, random condition(s) on part of the areas you will have to go through, random objectives, would be a great addition.
New skills, equivalent of 8 classes… this is like if they released with 12 classes instead of 4.
We will be able to combine abilities of different trees… this means lot of gameplay.
So believe me, it will change your gameplay cause you have more possibilities to create synergies between the new abilities and the blessings of your weapons.